Dumping-wagon



E. E. SCHMITT.

DUMPING WAGON.

APPLICATION FILED APR. 30, 1920.

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DUMPING WAGON.

APPLICATION FILED APR. 30, 1920.

1 58,675, Patented Nov. 9, 1920.

3 SHEETSSHEET 2.

E. E. SCHMITT.

DUMPING WAGON.

APPLICATION FILED APR. 30. I920.

1,358,675, Patented Nov. 9,

3 SHEETS-SHEE Im/enfo r J3 5 @202 ML ,7 .22 if UNITED STATES PATENTOFFICE.

EUGENE E. SCHMI'I'T, OF ST. LOUIS, MISSOURI.

DUMPING-WAGON.

* Application filed April 30,

' for hauling coal, sand, rock, dirt, and similar material adapted to bedumped by the tipping of the body, as well understood in the art. Theobjects sought by my invention are to provide a motor truck or othervehicle with a tilting body that may be actuated from the shaft of theengine which drives the vehicle, or by hand depending on the style ofvehicle to which the invention is applied; one in which the body istilted by a push rod connected to a reciprocating piston of a dumpingcylinder oscillating about a fixed horizontal axis, the piston beingactuated in either direction by a confined body of fluid (preferably oilor a nonfreezing liquid) circulating through and out of the cylinderfrom one side of the piston to the other, the direction of circulationbeing determined by the direction in which the piston is to be driven,said circulation being effected in one direction by a suitable rotarypump driven either from the shaft of the engine on the car, or by hand.A further object is to provide a dumping mechanism of the generalcharacter referred to which will be simple, under easy control of theoperator, one permitting the tilting body to be locked agalnst movementat any desired inclination; one which will allow the tilted body toreturn to its normal position of rest without jarring; and onepossessing further and other advantages better apparent from thefollowing detailed description of the invention in connection with theaccompanying drawings in which Figure 1 represents an outline sideelevation of a motor-truck provided with a dumping body to which myinvention is applied; Fig. 2 is an enlarged middle vertical longitudinalsectional detail through the fulcrum block or seat about which thedumping cylinder oscillates; Fig. 3 is a top plan of the actuatingmechanism, the dumping body being removed, and the trucleframe beingSpecification of Letters Patent.

frame (Fig. 1). the hinge axis of the body considerably be- PatentedNov. 9, 1920'.

1920. Serial No. 377,854. i

shown merely in outline; Fig. 4 is an enlarged vertical longitudinalmiddle section through the dumping cylinder and circulating ump thereof,on the line 4-4 of Fig. 3; 1g. 5 is a side elevation of the dumpingcylinder; Fig. 6 isan enlarged cross-section through the pump chambercommunicating with the cylinder on the line 6-6 of Fig. 5; Fig. 7 is aface view of the fulcrum block or dumping cylinder seat; Fig. 8 is adetail plan showlng the manner of pivoting the push rod to the dumpingbody; Fig. 9 is a cross-section on the line 99 of Fig. 8;

Fig. 10 is a diagrammatic plan of the" oil circulation through thedumping cylinder and the circulating pipes; Fig. 11 is an end view of amodification showing a manually operated shaft for driving the oil pump;Fig. 12 is a top plan thereof; Fig. 13 is a cross-section on the line13-13 of Fig. 12;

and Fig. 14: is a perspective of the bladesupporting head of the oilcirculating pump, one of the blades being shown in position forinsertion in the head.

Referring to the drawings, and for the present to Figs. 1 to 10inclusive, and Fig. 14, T represents a motor-truck frame and B thedumping body thereof, the hinge axis of the body being preferably belowits plane of support when resting on the frame. In

the present example the body is-provided at the rear end with dependingbrackets 1, the lower ends of which are hinged to the This arrangementbrings low the supporting plane of the frame, it being understood thatthere is a bracket on each side of the body, only one of which of courseappears in Fig. 1. The construction of the frame and body is immaterial,and falls wholly within the purview of the skiled mechanic. Tn thepresent example angle bars and lI-beams are made use of as clearly seenin the drawings. Disposed centrally on theframe T at a point below thefront end of the dumping body B, is a fulcrum block 2 bolted to thehorizontal legs of the angle-bars 3, 3, disposed across the frame T oneither side of. the block as clearly shown in Figs. 1, 2 and 3, the saidblock being provided with a semi-spherical cavity d forming a seat forthe fulcrum end of the dumping cylinder C, the block being provided witha vertically elongated slot s 'llhe fulcrum end of the dumping cylinderis chamber 4 to which leads an intake passage 5 at a suitable point ofits circumference, and from which leads a discharge passage 6 at a pointdiametrically opposite, the said passage 6 being disposed parallel tothe axis of the cylinder C and directly discharging thereinto (Figs. 4,10,). One side of the chamber 4 is closed by the inner wall of thespherical segment or casting a forming the outer section of the cylinderof the oil pump, the section a being bolted to .the section a as shownin Figs. 4 and 5. The section a is provided with a stuffing boX. orgland 7 of usual construction, the outer surface of the gland and thatof the section a forming conjointly a half sphere which fits thesemi-spherical cavity or de-' pression d of the fulcrum block 2, therebypermitting the dumpingcylinder C to oscillate about the fulcrum blockwhen the pump-cylinder casting formed by the assembling of the section01, and an, and the gland 7 is deposited in the cavity 03 of saidblock.- Passing through the stufling box '7 and through the outersection a of the pump cylinder isa shaft 8, the same terminating in thepump chamber 4 in a star-disk or head 9 formed with a series ofperipheral depressions h which receive the hinge-pin formations m of theblades 10,'said disk as wellas the shaft 8 being disposed eccentricallyto the axis of the chamber 4, whereby for a portion of the revolution ofthe shaft and disk the pump blades are caused to fold against theperiphery of the disk by the cylindrical walls of the chamber, andpermitted to open outwardly for. the remaining portion of saidrevolution, as clearly shown in Fig. 6. Leading from the passage 5 is anipple 11 to which is coupled one end of a circulating pipe 12, theopposite end of said pipe tapping the dumping cylinder C just beyond orat the limit of the outward stroke of the piston 13, said pipe 12 havingleading therefrom a. branch circulating pipe 14 which taps the cylinderat the limit of the inward stroke of the piston, the pipe 12 between itspoint of connection with the branch pipe and the nipple 11 and thebranch 14 being each provided with an ordinary rotary one-way valve V,V, respectively, the stems of which are provided with a lever arms 15,15', respectively, from which lead the links 16, 16, the front ends ofsaid links being respectively connected to the lower lever arms of theactuating levers L,

L, pivoted to the truck-frame within easyreach of the driver.

It is apparent from the connections described that with a throw of alever L, L, in one direction the valve (V. V',) controlled thereby willbe closed,

rename and with a throw in the opposite direction the valve will beturned to open position. In the present example, rotation is imparted tothe shaft 8 and its disk 9 from the'engine shaft 17 by the followingarrangement: Mounted loosely on the shaft (Fig. l) is a gear wheel 18the hub of which is formed with a clutch member 19 with which cooperatesthe sliding clutch member 20 controlled in the usual way by a shiftinglever 21 well understood in the art. The gear wheel. 18 is in mesh witha pinion 22 on a shaft 23 supported by the hangers 24, the rear end ofsaid shaft being coupled by a universal joint t to a telescoping orextensible shaft 25, which is in turn coupled by a universal joint t tothe shaft 8. It is apparent from the connections described that rotationof the engine shaft 17 will causerotation to be imparted to the shaft 8and hence to the disk 9 and the blades 10 13 is a piston rod or push rod26 .the outer end of which operates through a stufiing box 27 at thefree end of the dumping cylinder C, said rod terminating outside thecylinder in a'loop 28 loosely embracing a hinge pin 29 mounted in theblocks or bearings 30 bolted to'the bottom of the dumping body B nearthe center thereof (Fig. 1).

From the foregoing the operation will be readily understood and issubstantially as follows: The dumping cylinder C, pipes 12 and 14, andthe chamber 4 of the pump cylinder are filled with oil or any suitablenon-freezing liquid the circulation of this liquid in a given directiondetermining the direction of movement of the piston 13 and push-rod 26thereof. Referring to the diagrammatic illustration in Fig. 10, andassuming that the dumping body B of the motor-truck is in its normalposition of rest and is to be tilted to dumping position, the driver bymanipulating the levers L, .L, closes thevalve V and opens the valve V,and by shifting the clutch member 20 to engaging position with thecomplementary member 19, and starting the engine, rotation will beimparted to the shaft 17, and to the gear 18 which in turn, through theintermediate gearing previously described, imparts rotation to the shaft8 and to the disk or head 9 within the pump chamber 4. Assuming therotation of the disk 9 to be in the direction indicated in'Fig. 6, it isapparent that by reason of'theeccentric position of thedisk relativelyto the axis of the chamber 4, the blades 10 will be caused to foldagainst the disk by the circular walls of the chamber during a portionof their sively folds and unfolds, the oil in the chamber which is infront of a gradually folding blade will be forced out through thepassage 6 into the dumping cylinder behind the piston 18 thereby forcingthe piston outwardly. In its outward movement the oil in front of thepiston will be forced into the pipe 12 and be forced through the pipepast the open valve V back into the chamber 4 through the passage 5, theoil circulating in the manner described (see full arrows Fig. 10) solong as the piston 13 is being forced outwardly. With an outwardmovement of the piston the push rod 26 is forced out of the cylinder andthereby tilts the body B about the hinge axis of the brackets 1 pivotedto the frame T. As the body B starts to tilt it naturally lifts the pin29 and the push rod 26 pivotally coupled thereto, so that the push rodwhile moving outwardly from the cylinder 0 is at the same time raised oroscillated upwardly, causing the dumping cylinder to oscillatevertically about its support in the fulcrum block 2, the semi-sphericalformation of the assembled members a, a, 7 freely rotatingin thesemispherical depression (Z of the block. In these vertical oscillationsthe shaft 8 must necessarily participate, the inclined top and bottomwalls of the slot '8 allowing the shaft free play for this purpose, asobvious from Fig. 2. Necessarily the vertical webs of the angle bars 3,3, opposite. the cylinder C and shaft 8 are cut away to allow for theoscillations of these members (Figs. 2, 3). These oscillations by theway necessitate a telescopic form of shaft 25 as clearly obvious fromFig. 1, a vertical upward oscillation of the dumping cylindernecessarily shortenin the distance between the joints t and t. VVhen thebody B has been tilted the necessary degree to dump its load, the oilpump is stopped by either stopping the engine or disengaging the clutchsections 19, 20, and the valve V turned to closed position. closed sothat theliquid can no longer circulate, and the body is locked againstmovement in either direction. After the body B has been emptied, thedriver opens the valve V (valve V remaining closed) whereupon thecombined weights of the body and piston will force the confined liquidto cir culate as indicated by the dotted arrows in Fig. 10, the liquidin front of the piston being forcedthrough the pipe 14: past the openvalve V into the pipe 12, whence it flows into the cylinder behind thepiston, the latter continuing inwardly until it reaches the fullposition shown in the diagram, by which time the body has returned toits normal position of rest on the truckframe T. To again dump the bodythe valve V is again closed and the valve V opened,

' the oil pump set in motion, when the same operations as previouslydescribed will be We thus have both valves V, V,-

repeated. The fulcrum terminal of the dumplng cylinder G need notnecessarily rest in a dished out fulcrum'block such as 2, but thearrangement shownis a decidedly convenient to gear the pump shaft 8 tothe shaft of the engine. In that case'suitable provision may be made todrive the shaft 8 by hand. In Figs. 11, 12 and 13, is shown a hand drivein the form of a pinion 3L operated by a crank 32, the pinion engaging agear wheel 33 on a transverse shaft 3% provided with a worm 35, thelatter meshing with a worm gear 36 carried'by the shaft 23 forming thelast member of the flexible or ointed shaft previously described. It isclear from the connections shown that a turning of thecrank 32 willimpart rotation to the pump shaft 8. Other means for imparting rotationto the-pump shaft may be resorted to without in any Wise. departing fromthe nature or spirit of the invention. In fact the construction may bechanged in many details without involving a departure from theinvention. Features shown but not alluded to are well'known in the artand require no description in the present connection. Many of the partsare herein illustrated conventionally only, no attempt being made atdetailed description because well within the purview of the skilledmechanic. Obvipusly, the invention may be applied to horse-drawnvehicles as well as to self-propelled vehicles. In the case of theformer the circulating pump would in the majority of cases be handoperated.

Having described my invention what I claim is:

In a dumping wagon, a tilting body mounted to oscillate in a verticalplane, a vertically oscillatable dumping cylinder fulcrumed .at one end,the opposite end pointing toward the body, a push-rod leading from saidend and pivotally coupled to the body, means at the fulcrum end of thecylinder for circulating a confined body of fluid through and out of thecylinder in proper direction to force the push-rod in a direction totilt the body, a shaft leading from said fluid-circulating means in adirection opposite from the cylinder, a drlving member, and intermediateconnections between said member and shaft for actuating the latter andcirculating the fluid body as aforesaid.

2. In a dumping wagon, a tilting body, a cylinder oscillatable about afined axis, a pump-chamber communicating w th one end of the cylinder, acirculating pipe lead ng from the pump chamber and communicating withthe cylinder near the opposlte end thereof, a second circulating pipeleading from the end of the cylinder ad ace'nt the 'der,'means under thecontrol of the operator for actuating the valves, a push rod leadingfrom the piston through the end of the cylin-m der opposite from thepump chamber, atilting body coupled to the push rod, a pump in thechamber aforesaid for circulating a liquid through the cylinder andcirculating pipes aforesaid in a direction to force the piston in properdirection to tilt the body, the latter by its weight and with a propersetting of the valves effecting a circulation of the liquid in theopposite direction to allow the body to settle to its normal position ofrest, and means for actu ating the pump.

3. In a dumping wagon, a tilting body oscillating in a vertical plane, avertically oscillatable dumping cylinder fulcrumed at one end, theopposite end pointing toward, the body, a push-rod leading from said endand pivotally coupled to the body, apump,

at the fulcrum end of the cylinder for cir-.

culating a confined body of fluid through and out of'the cylinder inproper direction to force the push rod in" proper direction to tilt thebody, a shaft for the pump leading teasers cylinder through said slot,means for im-- parting rotation to said shaft, a piston in the cylinder,a push rod leading from the piston through the end of the cylinderopposite the fulcrum terminal thereof, and a member on the inner end ofthe pump-shaft for circulating a confined body of fluid through and outof the cylinder in proper direction to force the piston and push rodthereof outwardly, atilting body coupled to the push rod, and valves inthe circuit of the fluid positioned to permit the fluid to circulate inthe opposite direction under the weight of the body bearing against thepush rod. y

In testimony whereof I aflix my signature, in presence of two witnesses.

EUGENE E. SCHMITI. Witnesses:

EMIL STAREK, ELSE M. SIEGEL.

